Is is an adjective since it describes a noun. The adverb form would be "separately". An example of the adverb form would be "Batteries sold separately."
An adverb describes a verb, an adjective or another adverb.
The word small can be an adjective or an adverb.
Approximate is an adjective, approximately is an adverb.
The word very is an adverb.
Constantly is an adverb. Constant is an adjective.
It is closer to an adjective because it only modifies nouns. But it is classified as an "article" which is a separate form of grammatical determiner.
Dark can be an adjective or a noun. Darkly is an adverb.
This is two separate parts of speech. The word "new" here is an adjective, and describes the plural noun "books."
Adverb.Here is an adverb, not an adjective.
its an adverb an adjective is a descriptive word an adverb is a feeling
An adverb describes a verb, an adjective or another adverb.
It can be an adjective OR an adverb. adjective -- You dog is a friendly dog adverb -- She always talks friendly to me
Nervous is an adjective. The adverb form is nervously.
Yes, "especially" can function as both an adverb and an adjective. As an adverb, it modifies a verb, an adjective, another adverb, or a sentence. As an adjective, it describes a noun.
'The' is neither an adjective nor an adverb. It is an article.
No, it is not. It is an adverb, the adverb form of the adjective unsteady.
Comprehensible is an adjective. The adverb is comprehensibly.